SH7730 Datasheet, PDF (585/1188 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7780 Series

Section 17 Realtime Clock (RTC)
17.3.15 Year Alarm Register (RYRAR)
RYRAR is an alarm register corresponding to the year counter RYRCNT. The range of year
alarm, which can be set, is 0000 to 9999 (decimal). Errant operation will result if any other value
is set.
Bit: 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
1000-year units
100-year units
10-year units
1-year units
Initial value: — — — — — — — — — — — — — — — —
R/W: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial
Bit
Bit Name Value
R/W
15 to 12 
Undefined R/W
11 to 8 
Undefined R/W
7 to 4 
Undefined R/W
3 to 0 
Undefined R/W
Description
Thousand’s position of years setting value
Hundred’s position of years setting value
Ten’s position of years setting value
One’s position of years setting value
17.3.16 RTC Control Register 1 (RCR1)
RCR1 is a register that affects carry flags and alarm flags. It also selects whether to generate
interrupts for each flag.
RCR1 is initialized to H'00 by a power-on reset or a manual reset, and all bits are initialized to 0
except for the CF flag, which is undefined. When using the CF flag, it must be initialized
beforehand. This register is not initialized in standby mode.
Bit: 7
6
CF —
Initial value: — 0
R/W: R/W R
5
4
3
2
— CIE AIE —
0
0
0
0
R R/W R/W R
1
0
— AF
0
0
R R/W
Rev. 1.00 Sep. 19, 2007 Page 537 of 1136
REJ09B0359-0100